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针对目前国际国内普遍采用的固定密码身份认证系统，给出了一种基于混沌系统原理的动态身份认证密码系统。该系统在规定时间内，利用一维逻辑斯缔方程变换用户密码，利用无线寻呼系统使用户在用帐户进入的那一刻时才知道自己的进入密码，从而能够有效地防止密码泄露。系统固定时间间隔更改密码或每使用一次更改密码。而使用的混沌方程使从已知的任何数量的密码都不能推出下一个密码，大大提高了系统的可靠性。
Aiming at the commonly used fixed-password authentication system in the world and abroad, a dynamic authentication-password system based on chaos system principle is given. The system uses a one-dimensional Logistic Equation to transform the user’s password within a specified period of time, and uses the wireless paging system to make the user know his own password at the moment of entering the account, so as to effectively prevent the password from being leaked. The system changes the password at regular intervals or changes the password once each time it is used. The chaotic equation used makes it impossible to push the next passcode from any number of known ciphers, greatly improving the reliability of the system.